Part of the deal between NBC and Microsoft to sell television shows to Zune owners is that Microsoft will attempt to build in antipiracy technology that keeps anything you might have downloaded through less than legitimate means off the device. In other words, you can say goodbye to trading MP3 files or videos with your friends on the Zune — instead, you'll have to use officially authorized sources to charge it up with content. How will the Zune know if the video you're trying to download to the device was downloaded illegally or, say, created by you? Until digital watermarking technology improves significantly, it won't, and even then, who knows. So for you lonely Zune owners, prepare to get even lonelier, because the second the company implements this "feature," it can kiss goodbye to what little market share it now enjoys. (Photo by AP/Ted S. Warren)

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